The thing about time travel is that you inevitably bring in alternate versions of familiar characters, whether they be the same character from another point in their timeline, or a relative from a different era. Typically when we see future versions of teams, there are a lot of those. Especially in the nineties.
So Battle of the Atom, with its nineties sensibilities, lives true to that. We don’t get the answers for every member of these future X-Men, like how there’s no official confirmation on who the Xavier is, but we do have some answers. Like Day of Future Past Kitty Pryde.
IceHulk, we find out, isn’t even Iceman. Gandalf the Cold is Iceman. IceHulk? Well, they don’t tell us who he is, but they do show him get smashed so he very likely is nobody!
Finally, Sentinel-X, from the actual X-Men of the future, whom I’ve been calling Iron X-Man (such a cooler freaking name), he goes to talk to Jubilee and lets her know who he really is.
The adult version of her son, Shogo, meaning that at least in the short term, Marvel is serious about Jubilee having a kid. Here’s hoping he doesn’t get retconned!